package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;


@Service
@Slf4j
public class DishServiceImpl implements DishService {


    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private SetmealMapper setmealMapper;

    /*
     *  新增菜品和对应的口味
     * */
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        log.info("新增菜品和对应的口味,{}",dishDTO);
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);


        // 向菜品表插入一条数据
        dishMapper.insert(dish);
        Long dishId = dish.getId();
        // 想口味表插入多条数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() >= 0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            dishFlavorMapper.insertBatch(flavors);

        }
    }

    /*
     *  菜品分页查询
     * */
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /*
     *  删除菜品
     * */

    @Transactional
    public void deleteBatch(List<Long> ids) {
        // 判断菜品是否能够删除
        for (Long id : ids) {
           Dish dish =  dishMapper.getById(id);
           if (dish.getStatus() == StatusConstant.ENABLE){
               throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
           }
        }

        // 判断菜品是否被套餐关联
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if (setmealIds != null && !setmealIds.isEmpty()){
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
       /* // 删除菜品表中的菜品数据
        for (Long id : ids) {
            dishMapper.deleteById(id);
            // 删除口味表
            dishFlavorMapper.deleteByDishId(id);
        }*/

        // 删除菜品表中的菜品数据
        dishMapper.deleteByIds(ids);

        // 删除口味表
        dishFlavorMapper.deleteByDishIds(ids);


    }

    /*
     *  根据id查询菜品数据
     * */
    public DishVO getByIdWithFlavor(Long id) {
        // 根据id查询菜品数据
        Dish dish = dishMapper.getById(id);

        // 根据Id查询口味
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);
        // 封装DishVo
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }
    /*
     *  修改菜品数据和口味数据
     * */
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);

        // 修改菜品
        dishMapper.update(dish);
        //删除菜品口味数据
        dishFlavorMapper.deleteByDishId(dishDTO.getId());

        // 插入口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            dishFlavorMapper.insertBatch(flavors);

        }
    }


    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }
    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
